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P0641 Diagnostic Trouble Code Discussion for June 2012

5-Volt Reference 1 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0641
Help Request Posted
2007 Chevrolet Silverado 2500 HD WT 6.0L Hesitation, MIL Lamp on, Reduced power VIN: 1GCHK24K27
P0641: 5-Volt Reference 1 Circuit Malfunction. Recurring code P0641 (5 volt ref circuit 1).Have seen the voltage drop out for a split second,down to .75volts. Have not been able to duplicate in the shop.tried wiggle tests of the sensors on that circuit.Inspected wiring best as possible without ripping into...
June 26, 2012